/Engine/Source/Runtime/MeshDescription/Public/MeshDescription.h
Determines the vertex instances which form the perimeter of a polygon
void FindPolygonPerimeter ( const [FPolygonID](API\Runtime\MeshDescription\FPolygonID) PolygonID, [TArrayView](API\Runtime\Core\Containers\TArrayView)< [FEdgeID](API\Runtime\MeshDescription\FEdgeID) > Edges ) const